Polarized relay.



' Patented June 7,1910.

HINVEINTOQRI "Ma/w WITNESSES:

our-ran I s'rA'rEs PATENT orrrcn.

WISKTEROP K. ,HGVTE, 0F EQCHEST'ER, YORK, .ASSIGNOR 10- RAILWAY SIGNAL COMPANY, 0F GASES, NEW YORK, A-CORPORATION OF NEW YORK;

ronanrznn Rims.

ceases,

$pecilication'of Iietterslatn't. aw 9,15 7 910,

- application filed MaylB, 1909. Serial No. 497,126.

To all whomct may concern:

Be it known that l. Wnrrnuor ll. Hows, l i

citizen oi the United States, and resident of Rochester, in the county of Monroe and State of New York, have inventedcertain' armature. The object of the invention is to produce a relay of this type which shall he compact inform and efficient In operation, and to this end the invention consists.

in the relay hereinafter described and dis closed in the accompanying drawin 's, as the same is defined in the succeeding c aims.

In the drawings :-F igure 1 is a top plan of a relay constructed in accordance with this invention; Fig. 2 is an elevation, vlewed from the right. hand .end of Fig. 1,;

and Fig. 3 is a cross-section 'on the line 3-3 or Fig. 1.

The relay has a bed-plate 1., upon which are upright "brackets 2 thatsupport oppositely-placed ele'ctromagnets' 3 and 4. The

cores of the latter are threaded into the brackets so that they may be adjusted longitudinally, and'are secured in adjusted 'position by nuts Surrounding the electromagnets 3 and 4 are permanent magnets 6 and '7, respectively, of the horse-shoe type, that are fastened upon the bed-plate 1 liy clips 8.

The permanent" magnets 6 and 7 are so arranged that'their like poles are abutting. The two north poles N, N, are fixed in a bracket 9, and the two south poles S, S are separated only by a stud 10, that is support-' ed in a block 11 of nonmagnetic material.

The armature 12 is a flat bar that ispivoted on vertical hearing-points 13, 13, in the bracket 9 between the poles oi the magnets 6 and7, and is capable of movement toward the pole of either of the clectrom'ag' nets. A contact arm 14 on said armature is adapted to. engage either of the contact 1 screws 15 or 16 when the armature is swung.

induced in its inner end, as indicated at n in Fig; l. The stud 10, in contact with the south poles S, S, carries a pole piece l7 that extends toward the armature 12"and near'ly touches it. A souto pole is therefore induced in the end a of said tongue, and the latter therefore has a strong attraction for the armature 12, and tends to draw said armature to its neutral position midway between the inner ends'of the electromagnets 3 and r If the electromagnets are energized, and

the current flows in opposite directions through the coils of each, the ends of the magnet cores adjacent to the armature 12 are of opposite polarity. If the magnet 3, for instance, is so energized that the inner occurs, and the armature 12 is drawn toward the magnet 4 and repelled from the magnet end of its core becomes a south pole, the

3, and swings about the pivots 13, bringing the end 145 into contact with the screw 15. This action may be made to control various circuits, in any well known manner.

If the magnets 3 and 4: are so energized as toihe of the. same polarity, an equal. attraction or repulsion is exerted :on each side of the armature 12, and the latter remains in the central or neutral position until one magnet or the. otheris deenergized. When this occurs, the armature moves toward or away from the energized ma -net,depending onthe polarity thereof.

As soon as both the magnets 3 and. 4 are denergized, the; attraction of the pole piece 17 for the armature l2 forces'the latter to.

return to the neutral posit-ion shown in Fig. 1, and the device therefore is reset by the magnetic action of the permanent magnets acting on the armature and attracting it to its central or neutral position.

\Vhat I claim is:.

L Ina polarized relay, a pair ofelectro -1nagnets, a pair of permanent horseshoe magnets one around each electromagnet and having their like poles adjacent, movable armature pivoted to and magnetized by one of the magnetic poles and extending toward 

